My fiancee finds me very controlling

My fiancee finds me very controlling

I am 27 and my fiancee is 25. By nature, I am an overprotective person. Ever since we got engaged six months ago, I haven't hung out with my friends nor has she. It is always us. But she now feels she needs to spend time with her girl gang. To be honest, I dislike some of her friends and their habits. I feel they will make her go astray and poison her mind against me. This has led me to be very controlling in my relationship and is leading to constant squabbles among us. How do I explain my sit

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